var Something = { 
    id:3,
    cool: function() { 
    this.greeting = "Hello World"; 
    this.count = this.count ? this.count + 1 : 1; 
    } 
   }; 
  console.log( Something.cool()+'---'); 
   console.log(Something.greeting); // "Hello World" 
   console.log(Something.count); // 1 
   var Another = { 
       id:2,
    cool: function() { 
    // 隐式把 Something 混入 Another 
    Something.cool.call( this ); 
    console.log(this.id,1);
    } 
   }; 
   console.log(Another.cool()+"***"); 
   console.log(Another.greeting); // "Hello World" 
  console.log( Another.count); // 1 （count 不是共享状态）